Astrocartography
One moment, laid over the whole Earth. For any birth or event, see where each graha was rising, setting, culminating or under the earth — and where it stood at a sextile, square or trine to those four angles. Turn the globe, zoom in, choose a place, and read it through the relocated lagna.
Read a place
Name the place you are asking about — a city you might move to, a country you are drawn to, somewhere a thing happened — or simply click it on the map. The reading below is drawn from the lines that pass near it and from the chart recast for that spot.
How the map is made, and how to read it
What the lines are. At any instant each graha stands directly overhead at exactly one point on Earth. The meridian through that point is the graha’s MC line — everywhere along it, the graha is culminating — and the opposite meridian is its IC line. The great circle a quarter of the globe away from that point is where the graha lies on the horizon: its western half is the ASC line (rising) and its eastern half the DSC line (setting). These direct lines are drawn in mundo, from each graha’s true right ascension and declination, so a body with celestial latitude is shown where it actually crossed the horizon.
The aspect lines. A sextile, square or trine line marks the places where the angle itself — the rising, setting, culminating or anti-culminating degree of the zodiac — stood 60°, 90° or 120° from the graha’s longitude. Because the Descendant is always opposite the Ascendant, “sextile the ASC” and “trine the DSC” are the same curve, and a square to one is a square to the other; the same holds for MC and IC. The map draws each such curve once and names both of its meanings.
Why a Jyotiṣa reading. Astrocartography in this form is a twentieth-century technique, not a classical one. What is classical is its foundation: a graha on a kendra — the lagna, the 4th, the 7th, the 10th — is strong and visible in a life. The report therefore reads each nearby line as a graha on a kendra of the chart recast for that place, and weighs it as Jyotiṣa would: by the graha’s nature and kārakatva, its dig-bala (directional strength — Guru and Budha at the lagna, Sūrya and Maṅgala at the 10th, Śani at the 7th, Candra and Śukra at the 4th), its dignity by sidereal sign, and its lordship for the relocated lagna. Signs and nakṣatras use the true Lahiri (Citrapakṣa) ayanāṁśa. Sextile, square and trine belong to the Tājika branch of Jyotiṣa, where the trine is openly friendly, the sextile quietly friendly and the square quietly hostile. Uranus, Neptune and Pluto are drawn because many readers want them; they are not grahas, and the report says so where they appear.
Accuracy. Everything is computed in your browser — nothing you enter leaves it, except a place name sent to the Open-Meteo geocoder when you search. Checked against the Swiss Ephemeris at 500 moments between 1800 and 2100: Sun, Moon, Mercury, Jupiter, Saturn and the node agree within 1′, Venus, Neptune and Pluto within 2′, Mars and Uranus within 4′ — at worst a few kilometres on the ground. The grounds on which a line is felt are far wider than that: most practitioners allow several hundred kilometres either side. A birth time wrong by four minutes moves every line one degree of longitude.
Using it. Drag the globe to turn it; scroll, pinch or use the + and − buttons to zoom; switch to the flat map to see the whole world at once. Cities appear as you zoom in, the largest first and more with every step (names from GeoNames, CC BY 4.0). The PDF button saves exactly the view on screen, followed by the reading for the sought place if there is one.